package alg20241103;

public class Text {
    public int peakIndexInMountainArray(int[] arr) {
        int left = 0, right = arr.length - 1;
        while(left < right){
            int mid = left + (right - left) / 2;
            if(arr[mid] > arr[mid + 1]){
                right = mid;
            }else{
                left = mid + 1;
            }
        }
        return left;
    }
}
